Re: H7N9 influenza: History of similar viruses gives cause for concern, researchers report
Originally published on related thread:
mBio. H7N9 Avian Influenza A Virus and the Perpetual Challenge of Potential Human Pandemicity.
Notable Absence
Ongoing 2013
H7N3 Outbreak
throughout
Mexico
Hitting the deck, we have NOT any evidence of an ongoing H7N9 poultry epizootic in China, since there are not public data available, except few OIE reports about very few samples positive for the virus.
GM
Citation
Morens DM, Taubenberger JK, Fauci AS. 2013. H7N9 Avian Influenza A Virus and the Perpetual Challenge of Potential Human Pandemicity. mBio 4(4):e00445-13. doi:10.1128/mBio.00445-13.
Over recent decades, both HPAI and low-pathogenicity avian influenza (LPAI) H7 viruses have caused numerous explosive poultry outbreaks, notably massive 1999 H7N1 HPAI and 2003 H7N3 LPAI outbreaks in Italy (12, 13), a 2003 H7N7 HPAI outbreak in the Netherlands (14, 15), 2004 and 2007 HPAI H7N3 outbreaks in Western Canada (16), a 2012 HPAI H7N3 outbreak in Mexico (17), and ongoing enzootic circulation of H7N2 viruses in bird markets in New York (18).
A curiousity is evident due to
absence.
Following
Giuseppe Michieli's thought process and mention of the
OIE reports, we recalled the
2013 HPAI outbreaks of H7N3 Avian Influenza on commerical farms throughout the US
border nation of
Mexico. The authors of this paper
temporally cataloged H7 outbreaks around the world starting several decades in the past and ending with one current and ongoing H7N2 enzootic in New York. The start of the
current ongoing Mexican H7N3 series of outbreaks is
penultimately mentioned in the progressive list as
a 2012 event
as if the matter only occurred in the past and was effectively closed in 2012?
A review of the OIE reports made by the Mexican SENASICA and reported secondarily by the American CIDRAP demonstrates essential information concerning the H7N3 serotype, a reservoir that has been previously implicated in
formation of the emergent H7N9
Hemagglutinin antigens. No less than
61 outbreaks of H7N3 Avian Influenza are documented in
9 OIE reports throughout most of Mexico from
January to June 2013.
The SENASICA report of 2013-06-12 to
OIE indicates that "The event is continuing."
Vaccinated flocks with
asymptomatic HPAI carriers are found among the
2013 outbreaks in Mexico using serology-based surveillance. Some concern comes into play when a superspread situation is occuring and the carriers do not exhibit symptoms or define themselves clinically as infected. Concern rises when the discussion of event progression is truncated.
This type of information may be found in the future to be of considerable importance for Mexican and American citizens.
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